Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net income	$ 442,764	$ 420,825
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation	21,423	23,333
Depreciation	105,674	108,131
ESOP compensation expense	89,460	108,709
Deferred income tax (benefit) expense	(2,795)	12,504
Changes in assets and liabilities:
(Increase) decrease in trade receivable, net	(244,628)	1,066,287
Decrease in income tax receivable	163,761	45,775
(Increase) decrease in inventories, net	(726,219)	396,501
(Increase) decrease in prepaid expenses and other current assets	(48,774)	17,321
Increase in accounts payable	76,326	323,651
Increase (decrease) in accrued salaries and wages	87,154	(5,268)
Decrease in vacation accrual	(35,854)	(37,369)
Decrease in ESOP payable	(11,250)	(15,417)
Decrease in other accrued expenses	(117,909)	(58,990)
Increase (decrease) in payroll and other taxes withheld	2,656	(1,234)
Net cash (used in) provided by operating activities	(198,211)	2,404,759
Cash Flows from Investing Activities:
Additions to property, plant and equipment	(28,758)	(155,730)
Purchase of investment securities	(2,583,383)	(4,391,056)
Proceeds from sale/maturity of investment securities	723,118	1,256,350
Net cash used in investing activities	(1,889,023)	(3,290,436)
Cash Flows from Financing Activities:
Dividends on common stock	(581,580)	(575,754)
Net cash used in financing activities	(581,580)	(575,754)
Decrease in cash and cash equivalents	(2,668,814)	(1,461,431)
Cash and cash equivalents, beginning of period	10,058,163	10,031,644
Cash and cash equivalents, end of period	7,389,349	8,570,213
Supplemental Schedule of Cash Flow Information:
Income taxes paid	$ 20,000	$ 111,000